danforth



,-DELos's A. DANroRTH, or ELKHART, INDIANA.

Letters Patent No. 99,858, dated February 15, v1870.-

IMPROVEMENT IN DRIVE WELL-TUBES vThe Schedule referred to in these Letters Patent and making part of the same..

To all whom. it may concern:

Be it known that I, Dnnoss A. DANFORTH, of the city and county o f Elkhart, and State of Indiana, have invented a new and useful Improvement in Drive Well-Tubes; and l do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, making a part ot' this specification, in Which Figure l is a view of drive well-tube, 'showing'a portion of case or screen broken away to give a view of tube, the'lower portion of which and point are represented in section.

Figure 2 is a view of a sheet of brass, or other 'metal, outof which screen is. made, and showinga part of apertures of same made finer than others, the object of which will be hereinafter explained.

My invention is intended as an improvement on that patented by me February 9, 1869. In that the` case or screen enclosing tube is constructed with punctures alternately from tbe outside and inside of the case, so' as to form alternate edges and depressions on the outside and inside'of the same. i

My present invention consists in taking a. sheet of brass or other metal, out of which case or screen is made, and so punching apertures through it as to depress the edges thereof, so that by placing the said sheet of brass between pressure-rollers, the edges of the apertures may be so `pressed in as to reduce the apertures to any degree of fineness required,w hich 'is very necessary, as many soils-are iner than others, hence the screen can in this manner be made to suit different kinds of soil; also, in fastening the case or screen to prevent it from sliding upon the tube, by turning in the bottom-edge of the screen, and constructing' or casting the point withxa shoulder, and shn'nkinga jam-nut on over it, provided with female screw-threads, and constructing the lower end of tube with male screw-threads, having a shoulder above, so that by screwing the point thereon the turned-in edges of the screen will be firmly pressed and held against the shoulder ofthe tube.

I construct'and operate my invention as follows:

A is the tube, provided, as ordinarily, with perfora- 'rions a, for the admission of the water, and having screw-threads at the lower end to receive the jam-nut b of the point B, which screws thereon; and alsof a collar or ring, c, cast therewith at thel terminus of the screw-threads above, or otherwise secured thereto, so

as to form a shoulderffor the jam-nut to hold the turned-in edges d of the case or screen against the shoulder, thus preventing it from sliding up.

I C is the case or screen, provided with apertures e, as seen inthe drawings.

A sheet of brass or other metal, beingselected and cut to the proper size to form the case or screen, is

laid down on a. lead or other suit-able surface, and the apertures punchedthrough with a punch suitable for the purpose, the punch necessarily7 pressing the edges down, so that they stand out when the sheet of-brass is taken up.; thus, by placing the same 4between] ordinary rollers, and regulating .the pressure thereupon,

the edges may be pressed in so as to close `the aperturesto the degree of fiueness required, according to the nature or kind of 'soil it is designed Yto use the screen in.

Fig.'2 shows a sheet ofv brass metal, havingthe apertures ofthe lower paitthercof reduced to a dit'- ferent degree of tineness from that above, the apertures above, as will be seen, heilig larger than those at the bottom.

A Wire, D, is wound spirally around the tube, and I fastened thereto to keep the screen olf from the tube, so that the water will have frec passage around the tube and through the perforations..

As stated, the point B is cast with a shoulder, g,

and the jam-nut shrunk on over it against the shoule der, this being the mostfeasible method of providing the point with screw-threads, it being difficult to bore .the point out itself and put screw-threads on the intestructed as described, in combination with the ccllai` or ring c of tube, forming a shOuIderthereOrI,- and screw-point B, having the jana-nut' b secured thereto, and provided with shoulder g, substantially asjset forth.

As evidence that 'I claim the foregoing as my in-y vention, I have hereunto set my hand in the presence of two witnesses.

D. DANFOR'ITEI,l

Witnesses A. N OHAMBERLAIN, B. TnRNocK. 

